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Income Taxes Income Tax Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Operating Loss Carryforwards [Line Items] |  |  |  |
Tax Cuts and Jobs Act of 2017, Incomplete Accounting, Change in Tax Rate, Provisional Income Tax Expense |  | $ 7 |  | $ 55
Tax Cuts and Jobs Act of 2017, Indirect Impact on Inventory, Income Tax Expense |  |  |  | $ 16
Tax charge related to U.S. state blended tax rate changes associated with the Business Separations | $ 114 |  | $ 146 |
Tax charge related to application of the Act's foreign tax provisions | 96 |  | 96 |
Tax benefit related to an internal legal entity restructuring associated with the Intended Business Separations |  |  | 102 |
Other Tax Benefit | $ 21 |  | $ 21 |

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- Definition Amount of other income tax expense (benefit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32639-109319 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32672-109319 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(h)(1)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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